[Radiance-general] Depth outdoor daylighting test facility

[Stephen Selkowitz]

Giuseppe et al

For more details about the FLEXLAB facility you can visit flexlab.lbl.gov
Andy recently completed the first client study in the facility that
involved daylight/energy/glare assessments with glazing, fixed shading,
operable shading etc  but not specifically "redirecting" devices- study to
be published later this year;  as he noted we expect to be doing new
testing of daylight redirecting systems over the next year.

Some additional examples of prior measuring and modeling of daylight
control and redirecting systems can be captured from
http://facades.lbl.gov/daylighting-systems

The IEA SHC Task 21 on Daylighting published a 260 page book- "Daylight in
Buildings, A Source Book on Daylighting Systems and Components"
You can download a 5MB PDF from our website:
http://buildings.lbl.gov/sites/all/files/daylight-in-buildings.pdf
This is about 15 years old but the sun is much older and both R&D and
practice move slowly so much of the info is still useful.  The Appendix in
the report describes 9 test facilities around the world ( as of ~2000) that
do/did daylight testing; with a semi technical description of their
measurement capabilities.  We have some extra (physical) copies of the
books on our shelves- if you still like hard bound books and daylight and
are not too far away to send ( they weigh about 5 pounds) I can mail a
copy. There is also a CD-ROM that contains the book and some additional
200MB of related files; I could post that on Dropbox if people are
interested.

Steve

**********************************************************************

Stephen Selkowitz

Building Technology and Urban Systems Department             (510) 486-5064

Bldg.90-3111
       fax (510) 486-4089

Lawrence Berkeley National Laboratory
SESelkowitz at lbl.gov

Berkeley, CA 94720
http://buildings.lbl.gov/ <http://BTECH.lbl.gov/>

**********************************************************************

On Fri, Jan 23, 2015 at 9:21 AM, Giuseppe De Michele <giudm.87 at gmail.com>
wrote:

> Thank you at all for the precious help. We will take in account all your
> advices.
>
> In the next weeks I will update you with the project evolution.
>
> Happy weekend,
> Giuseppe
> For another datapoint, the Research Support Facility here at NREL is
> rather well daylit, and is 60' deep, but receives light from the north side
> as well as the south, in addition to heavy use of daylight redirection from
> the south. From experience (I've had a desk in the  middle of this building
> for the last few years), I'd say that the daylight redirection devices
> provide useful daylight as far back as 35' under ideal conditions, and on
> average to 25' from the south wall. These devices can also paint the back
> wall - 60' away from the source - with daylight! While impressive, I still
> say that *useful* daylight from those things (i.e. horizontal task
> illuminance >=250 lux) penetrates 35' or so at most; pretty much about as
> deep as LBNL's new test space (FLEXLAB).
>
> I also like Christoph's idea for a standard office reference model for
> simulation; liked it the first time when it was called CIE 171:2006, too.
> ;) In all seriousness, I believe this Reinhart et al. model is a great idea
> -- especially product comparisons in simulation, across climates.
>
> - Rob
>
> On 1/22/15, 11:24 AM, "Andrew McNeil" <amcneil at lbl.gov<mailto:
> amcneil at lbl.gov>> wrote:
>
> Hi Giuseppe,
>
> At LBNL we find that our window test bed (10 feet wide by 15 feet deep)
> isn't deep enough to demonstrate all the full benefits of daylight
> redirection. In this facility the redirected daylight often hits the back
> wall.
>
> Our new FLEXLAB (20 feet wide by 30 feet deep) we believe these dimensions
> are deep enough, but we haven't yet tested daylight redirecting systems in
> FLEXLAB (coming this spring!).
>
> I like Christoph's suggestion of a standard reference office for testing
> systems via simulation. And if physical test cells match the dimensions of
> the simulation standard, all the better. A global network of identical test
> cells at different institutions would be amazing.
>
> Andy
>
>
> On Thu, Jan 22, 2015 at 8:36 AM, Christoph Reinhart <tito_ at mit.edu<mailto:
> tito_ at mit.edu>> wrote:
> Hi Giuseppe,
>
> You might want to have a look at this document
> http://mit.edu/sustainabledesignlab/projects/ReferenceOffice/index.html
> which describe a reference office that can be used for the purposes
> described by you.
>
> Best,
>
> Christoph
>
> From: Giuseppe De Michele [mailto:giudm.87 at gmail.com<mailto:
> giudm.87 at gmail.com>]
> Sent: Thursday, January 22, 2015 11:28 AM
> To: Radiance general discussion
> Subject: [Radiance-general] Depth outdoor daylighting test facility
>
> Dear experts,
>
> I am involved in the design of an outdoor daylighting test facility.
>
> I am trying to evaluate the minimum depth of the lab in order to be able
> to study redirecting daylight systems (i.e. light shelves or complex
> lamella).
> Cell height: 2.7 m and cell width: 5.5 m.
>
> Our idea is to cover, let's say, "90%" of the applications of these
> systems.
>
> Do you have experience in that field? Or can you suggest a modeling
> approach to answer this question?
>
> Thank you in advance.
>
> Cheers,
> Giuseppe.
>
> _______________________________________________
> Radiance-general mailing list
> Radiance-general at radiance-online.org<mailto:
> Radiance-general at radiance-online.org>
> http://www.radiance-online.org/mailman/listinfo/radiance-general
>
>
>
> _______________________________________________
> Radiance-general mailing list
> Radiance-general at radiance-online.org
> http://www.radiance-online.org/mailman/listinfo/radiance-general
>
> _______________________________________________
> Radiance-general mailing list
> Radiance-general at radiance-online.org
> http://www.radiance-online.org/mailman/listinfo/radiance-general
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.radiance-online.org/pipermail/radiance-general/attachments/20150123/dcce4ef1/attachment-0001.html>